Complexo Hospitalario Universitario Of Santiago Chus Sergas

Santiago de Compostela, Spain

Complexo Hospitalario Universitario Of Santiago Chus Sergas

Santiago de Compostela, Spain
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Barja-Fernandez S.,Complexo Hospitalario Universitario Of Santiago Chus Sergas Santiago Of Compostela | Barja-Fernandez S.,University of Santiago de Compostela | Barja-Fernandez S.,CIBER ISCIII | Folgueira C.,Complexo Hospitalario Universitario Of Santiago Chus Sergas Santiago Of Compostela | And 15 more authors.
Scientific Reports | Year: 2016

The fibronectin type III domain-containing protein 5 (FNDC5) discovered in 2002 has recently gained attention due to its potential role in protecting against obesity. In rat, no data exist regarding FNDC5 production and regulation in the stomach. The aim of the present work was to determine the expression of FNDC5 in the rat stomach and its potential regulation by body composition. The present data shows FNDC5 gene expression in the gastric mucosa. Immunohistochemical studies found FNDC5 immunopositivity in chief cells of gastric tissue. By the use of three different antibodies FNDC5 was found expressed in gastric mucosa and secreted by the stomach. The rate of gastric FNDC5 secretion parallels the circulating levels of FNDC5. The body fat mass increase after intervention with high fat diet coincided with a decrease in the secretion of FNDC5 from the stomach and a diminution in the FNDC5 circulating levels. In summary, the present data shows, for the first time, the expression of FNDC5 in the stomach of rats and its regulation by body composition, suggesting a potential role of gastric FNDC5 in energy homeostasis.


Pardo M.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Pardo M.,CIBER ISCIII | Roca-Rivada A.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Roca-Rivada A.,CIBER ISCIII | And 4 more authors.
Endocrine | Year: 2012

Obesity is presently reaching pandemic proportions and it is becoming a major health concern in developed and developing countries due to its comorbidities like type II diabetes, cardiovascular pathologies, and some cancers. The discovery of the adipose tissue role as an endocrine gland able to secrete adipokines that affects whole-body energy homeostasis has become a key break-through toward a better molecular understanding of obesity. Among the known adipokines involved in the regulation of energy metabolism very few have been clearly seen as central regulators of insulin sensitivity, metabolism, and energy homeostasis. Thus, the discovery and characterization of new adipocyte-derived factors is still in progress. Proteomics technology has emerged as a useful tool to analyze adipose tissue secretion (secretome) dynamics giving awider picture into themolecular events that control body weight. Besides the identification of new secreted proteins, the advantage of using this approach is the possibility to detect post-translational modifications and protein interactions that generally cannot be predicted by genome studies. In this review, we summarize the recent efforts to identify new bioactive adipokines by proteomics especially in pathological situations such as obesity. © Springer Science+Business Media, LLC 2012.


Roca-Rivada A.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Roca-Rivada A.,CIBER ISCIII | Castelao C.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Castelao C.,CIBER ISCIII | And 11 more authors.
PLoS ONE | Year: 2013

Exercise provides clear beneficial effects for the prevention of numerous diseases. However, many of the molecular events responsible for the curative and protective role of exercise remain elusive. The recent discovery of FNDC5/irisin protein that is liberated by muscle tissue in response to exercise might be an important finding with regard to this unsolved mechanism. The most striking aspect of this myokine is its alleged capacity to drive brown-fat development of white fat and thermogenesis. However, the nature and secretion form of this new protein is controversial. The present study reveals that rat skeletal muscle secretes a 25 kDa form of FNDC5, while the 12 kDa/irisin theoretical peptide was not detected. More importantly, this study is the first to reveal that white adipose tissue (WAT) also secretes FNDC5; hence, it may also behave as an adipokine. Our data using rat adipose tissue explants secretomes proves that visceral adipose tissue (VAT), and especially subcutaneous adipose tissue (SAT), express and secrete FNDC5. We also show that short-term periods of endurance exercise training induced FNDC5 secretion by SAT and VAT. Moreover, we observed that WAT significantly reduced FNDC5 secretion in fasting animals. Interestingly, WAT of obese animals over-secreted this hormone, which might suggest a type of resistance. Because 72% of circulating FNDC5/irisin was previously attributed to muscle secretion, our findings suggest a muscle-adipose tissue crosstalk through a regulatory feedback mechanism. © 2013 Roca-Rivada et al.


Roca-Rivada A.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Roca-Rivada A.,CIBER ISCIII | Al-Massadi O.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Al-Massadi O.,CIBER ISCIII | And 11 more authors.
Journal of Proteomics | Year: 2012

The notion that skeletal muscle is a secretory organ capable to release proteins that can act locally in an autocrine/paracrine manner or even in an endocrine manner to communicate with distant tissues has now been recognized. Under this context, a new paradigm has arisen implicating the muscle in metabolism regulation. Considering the evidences that give exercise a protective role against illnesses associated to physical inactivity, it becomes of especial relevance to characterize muscle secreted proteins. In the present study we show for the first time the secretome characterization and the comparative 2-DE secretome analysis among fast-glycolytic (gastrocnemius) and slow-oxidative (soleus) rat muscle explants and its variation after exercise intervention. We have identified 19 differently secreted proteins when comparing soleus and gastrocnemius secretomes, and 10 in gastrocnemius and 17 in soleus distinctive secreted proteins after 1. week of endurance exercise training. Among identified proteins, DJ-1 was found to be more abundant in fast-glycolytic fiber secretomes. On the contrary, FABP-3 was elevated in slow-oxidative fiber secretomes, although its secretion from gastrocnemius muscle increased in exercised animals. These and other secreted proteins identified in this work may be considered as potential myokines. © 2012 Elsevier B.V.


Folgueira C.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Folgueira C.,CIBER ISCIII | Seoane L.M.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Seoane L.M.,CIBER ISCIII | And 2 more authors.
Frontiers of Hormone Research | Year: 2014

The stomach-brain connection has been revealed to be one of the most promising targets in treating obesity. The stomach plays a key role in the homeostatic mechanism implicating stomach-brain communication regulated under neural and hormonal control. The present review explores specific topics related to gut-brain interactions focus on the stomach-brain connection through the different known systems implied in energy balance control as ghrelin, and nesfatin. Moreover, novel mechanisms for energy balance regulation involving gastric-brain communication are described including the role of the gastric intracellular mTOR/S6K1 pathway mediating the interaction among ghrelin, nesfatin and endocannabinoid gastric systems to modulate metabolism. © 2014 S. Karger AG, Basel.


Roca-Rivada A.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | Roca-Rivada A.,CIBER ISCIII | Alonso J.,Institute Investigacion Sanitaria Of Santiago Of Compostela Chus Sergas | Al-Massadi O.,Complexo Hospitalario Universitario Of Santiago Chus Sergas | And 13 more authors.
Journal of Proteomics | Year: 2011

Obesity prevalence is reaching pandemic proportions becoming a major public health threat for many industrialized nations. It is especially worrying as it causes a higher risk of premature death due to associated diseases such as type 2 diabetes, cardiovascular disease, and some cancers. Current evidence shows biological and genetic differences between adipose tissues depending on its anatomical location. Particularly, upper body/visceral fat distribution in obesity is closely linked to metabolic complications. In this report, we characterize for the first time the secretome of rat adipose tissue explants from different anatomical localizations and its differential analysis. Visceral, subcutaneous, and gonadal fat specific secretomes and differentially secreted proteins among the three fat depots were analyzed by 2-DE and MS. Reference maps for location-specific adipose tissue secretomes are shown and the 45 most significant differences are listed. Identified proteins include classical adipokines and novel secreted proteins. Interestingly, our results show that the type of proteins and their role in different biological processes diverge significantly when comparing the set of proteins identified from visceral, subcutaneous and gonadal fat explants. This study emphasizes and supports the differential role of adipose tissue in accordance to its anatomical localization. © 2011 Elsevier B.V.


PubMed | Complexo Hospitalario Universitario Of Santiago Chus Sergas, University of Santiago de Compostela and CIBER ISCIII
Type: | Journal: Molecular and cellular endocrinology | Year: 2015

Nesfatin-1, which is derived from the NEFA/nucleobindin 2 (NUCB2) precursor, was recently identified as an anorexigenic peptide that is produced in several tissues including the hypothalamus. Currently, no data exist regarding the regulation of NUCB2/nesfatin-1 production in peripheral tissues, such as gastric mucosa and adipose tissue, through different periods of development. The aim of the present work was to study the variations on circulating levels, mRNA expression and tissue content in gastric mucosa and adipose tissue of NUCB2/nesfatin-1 with age and specially in two clue periods of maturation, weaning and puberty. The weaning period affected NUCB2/nesfatin-1 production in gastric tissue. The testosterone changes associated with the initiation of puberty regulated NUCB2/nesfatin-1 production via adipose tissue and gastric NUCB2/nesfatin-1 production. In conclusion, the production of NUCB2/nesfatin-1 by the stomach and adipose tissue fluctuates with age to regulate energy homeostasis during different states of development.


PubMed | Complexo Hospitalario Universitario Of Santiago Chus Sergas
Type: Journal Article | Journal: PloS one | Year: 2013

Exercise provides clear beneficial effects for the prevention of numerous diseases. However, many of the molecular events responsible for the curative and protective role of exercise remain elusive. The recent discovery of FNDC5/irisin protein that is liberated by muscle tissue in response to exercise might be an important finding with regard to this unsolved mechanism. The most striking aspect of this myokine is its alleged capacity to drive brown-fat development of white fat and thermogenesis. However, the nature and secretion form of this new protein is controversial. The present study reveals that rat skeletal muscle secretes a 25 kDa form of FNDC5, while the 12 kDa/irisin theoretical peptide was not detected. More importantly, this study is the first to reveal that white adipose tissue (WAT) also secretes FNDC5; hence, it may also behave as an adipokine. Our data using rat adipose tissue explants secretomes proves that visceral adipose tissue (VAT), and especially subcutaneous adipose tissue (SAT), express and secrete FNDC5. We also show that short-term periods of endurance exercise training induced FNDC5 secretion by SAT and VAT. Moreover, we observed that WAT significantly reduced FNDC5 secretion in fasting animals. Interestingly, WAT of obese animals over-secreted this hormone, which might suggest a type of resistance. Because 72% of circulating FNDC5/irisin was previously attributed to muscle secretion, our findings suggest a muscle-adipose tissue crosstalk through a regulatory feedback mechanism.


PubMed | Complexo Hospitalario Universitario Of Santiago Chus Sergas
Type: Journal Article | Journal: Journal of proteomics | Year: 2011

Obesity prevalence is reaching pandemic proportions becoming a major public health threat for many industrialized nations. It is especially worrying as it causes a higher risk of premature death due to associated diseases such as type 2 diabetes, cardiovascular disease, and some cancers. Current evidence shows biological and genetic differences between adipose tissues depending on its anatomical location. Particularly, upper body/visceral fat distribution in obesity is closely linked to metabolic complications. In this report, we characterize for the first time the secretome of rat adipose tissue explants from different anatomical localizations and its differential analysis. Visceral, subcutaneous, and gonadal fat specific secretomes and differentially secreted proteins among the three fat depots were analyzed by 2-DE and MS. Reference maps for location-specific adipose tissue secretomes are shown and the 45 most significant differences are listed. Identified proteins include classical adipokines and novel secreted proteins. Interestingly, our results show that the type of proteins and their role in different biological processes diverge significantly when comparing the set of proteins identified from visceral, subcutaneous and gonadal fat explants. This study emphasizes and supports the differential role of adipose tissue in accordance to its anatomical localization.


PubMed | Complexo Hospitalario Universitario Of Santiago Chus Sergas
Type: Journal Article | Journal: Endocrine | Year: 2012

Obesity is presently reaching pandemic proportions and it is becoming a major health concern in developed and developing countries due to its comorbidities like type II diabetes, cardiovascular pathologies, and some cancers. The discovery of the adipose tissue role as an endocrine gland able to secrete adipokines that affects whole-body energy homeostasis has become a key break-through toward a better molecular understanding of obesity. Among the known adipokines involved in the regulation of energy metabolism very few have been clearly seen as central regulators of insulin sensitivity, metabolism, and energy homeostasis. Thus, the discovery and characterization of new adipocyte-derived factors is still in progress. Proteomics technology has emerged as a useful tool to analyze adipose tissue secretion (secretome) dynamics giving a wider picture into the molecular events that control body weight. Besides the identification of new secreted proteins, the advantage of using this approach is the possibility to detect post-translational modifications and protein interactions that generally cannot be predicted by genome studies. In this review, we summarize the recent efforts to identify new bioactive adipokines by proteomics especially in pathological situations such as obesity.

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